Concrete-block machine.



110.821.642. PATENTBD 111.1129, 190e.

l 1.1111011. v GONGRETE 111.00.11 MACHINE..

APrLioAnon FILED 11111118.1905.

2 snnnTs-snn'n'r 1.

MIF/misas. 4 IWI/22270?? #www 12mm La/f Mfg/@KK N y UNITED STEIES PATENT OEEIgOE.

THOMAS c. HOLT, OE MINNEAPOLIS, MINNESOTA., ASSIGNOR or ONE- I HALE :ro THEODOREDUNN, OE MINNEAPOLIS, MINNESOTA.

CONCRETE-stock MAoHlNE.

' Specication of Letters Patent.

I Application led May 18, 1905. Serial No. 260,92.

To a/l whom it may concern: l

ABe it known that. I, THOMAS C. HOLT, a

citizen of the United States, residing at Minn'eapolis, in the county of Hennepin and AState of Minnesota, have invented certain building-blocks; and to this end it consists of the novel devices -and combinations of devices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views. y

Figure 1 is a plan view of the improved molding-machine. Fig. 2 is a view, partly in side elevation and partly in vertical section,

on the irregular line m2 of Fig. 1. Fig. 3 is a view, partly in elevation and partly in vertical section, on the line x3 ma of Fi Fig. 4 is a detail showing one of the adj hinged brackets. y

The numeral 1 indicates a table or bedplate sup orted by legs 2, which legs are tied together by horizontal bars 3. The table 1 has a lar e rectangular central opening 4 and is formed with slots 5 and 6. A rigidly-secured split barv7 extends transversely across ustable the rectangular opening-,11. The table 1 at the edges ofthe opening 4 and extending at a right angle to the split bar 7 is formed with depressed gllide-ilanges 8, that afford a supporting-track for the ends of adjustable bars 9, which bars are adapted to be secured in ,different set positions. The adjustable bars 9 are provided with hinged lugs 10.

` The moldin -flask illustrated is constructed to form two b ocks at one time, and hence a vertical movable partition-plate 11 is arranged' to work through the slit in the split bar 7. At its ends this partition-plate 11 is formed with depending cross-heads 12, that- 1; andI lnated as side plates 14 and end plates 15. The side plates 14 are provided with lugs 16, that are pivotally connected by pins 17 to the hinged lugs 10 of the adjustable bars 9. At `their ends said side plates 14 are provided .tatented May 29, 1906.

with flanges 18, that are adapted to engage and hold the end plates 15, as best shown 1n' Fig. 1. The end plates 15 are provided with hinge-lugs 19, that are pivotally connected by pins 20 to hinge-brackets 21, which hinged brackets are provided with nuts 22, by means of which they may be secured in their set p'osition. The end lates 15 are provided with latchhooks 23, t at engage with lugs 24 on said plates 14 to hold the latter-'in the vertical position, as shown in the drawings. As shown, said plates 15 are `formed with Vertical grooves 15, in which the ends of the partition-plate 11 are arranged to slide.

The numeral 25 indicates detachable moldboards that form temporary bottoms to the compartments of the flask and are loosely supportedby the fixed and adjustable bars 7 and 9, respectively. As shown, these boards 25 are made up each of two vertically-spaced boards separated Aby spacing-strips, said parts being nailed or otherwise secured together.

To form the concrete blocks hollow or with air-spaces, vertically-movable cores 26 are provided. These cores 26 work through openings in the inold-boards 25 and are rigidly secured to vertically-movable bars 27, which bars at their ends are provided with de ending cross-heads 28, that work in verticalp channehguides 29. The channel-guides 29 are mounted for lateral adjustments toward and from the partition-plate 11, this ad' ,justment, as shown, being accomplished by means of nut-bolts 30, that work in slots 31, formed with the adjacent frame-bars 3.

For simultaneously raising and lowering both of the core-supporting bars 27 and the partition-plate 11 I rovide a lifting-bail 32, the trunnions of w 'ch are journaled, the bearings 33 secured to the adjacent framebars 3. One of the trunnions of said liftingbail has rigidly secured to it a latch-lever 34, that-cooperates with the notched latch-segment 35,.attached at its'upper end to the table 1. The transverse body or crank portions of the liftin -bail 32 directly engage with the central ower portions of the two IOO stood that the machine cote-suppoting liars .Z and the partition plate il, so that y Veitical movements oi said. 1nail the said cores and partition may he moved upward. and positive@T held in tlieii ...ive positions, as shown in the draw- O. in onder that a. downwaid movement oi the said bail will positively Atorce downward the eci-es and the paitition-plate 3.1, both of' the hais i1? and the paftitiomplate 1l aicpiovidod with yoles 36. that extend onv dei* and einhieee the body pozftion ot said littw ing-limil.

/. adiustnients of the hars Q the width of 3 olools iioimed in the fiasl may he Varied, and. such adjustment, as is obvious, will ieq adjustments oi the channel-guides 2Q, the cores lo always at the f nl .oi oi the nicole For 1oloclis idtl din-erentend plates should y adjustments of the hinged 2l .in vthe slots l5 the length of the s nay he Vaiied, and for such adjusts diffe-tent side plates le. and partitionshould be employed. Foi eX- e y wide 1olocks the adjustable bars 9 be dispensed with, and the side plates ay he hing, l additional brackets 21, ovided tici* that purpose and applied in. the cotes 5 of the table in the saine manner as own and before described inconnection li the slots 6. The several slots 6 afford means for the application 'oi hinge-brackets 2l to i'it and support end platesof different length.

il he machin e above desctil'ied has-been constructed and put in actual use and has been `onn extremely eliicient foi' the purposes had in. `View. With this machine two blocks may' be .termed as quickly as single 1olool;

een ne formed in other machines.

lli'oin what has been said it will be underis capable of medin- 'having separa-ble and.

senese cation within the scope of invention as herein. set forth and claimed.

What l claim, and desire to secure by Letters jatent of the United Sta-tes, isa-s follows:

il. The combination of a vertically-movable partitionmlate Woiking in said flask, a pail o vertically-movable bars having cores Woilino; in the. oompart# ments ct said flask, and aliitinghail having an 'actuating-l-ever and operative on said pai- Ltition-plate and on said coiesupporting bats,

` to simultaneously raise and simultaneously lower the same, substantially as described.

2. The combination with n1olding-ilask lateially-adjnstable side plates and a vertically-movable parti tion-plate, oi' verticallymovahle hats pio vided.y with coies ,t'oilaipg in the compait ments ci said flask, v'eFtically-disposed late ally-adjustable guides'in which the ends of said core-su portinqlars woik, and alever actuated l ting-bail opemting on the said paitition-plate and on said core-supporting nais to simultaneously' i'aise and simultaneously lower said partition-plate and said cores, solostantiallgT as described.

3. The combination with a moldingdlask, of a. dividingpartition in said liask, a pair oi vertically-movable cores working in the coinpartments of said flask, guides foi? said cotes aii'anged iol latefal adjustments so as to move the cores bodily, toward and iTom said partition-plate, and means 'for sinniltaneouslyv moving said cores into .voiling positions and. from. working positions, substantially as desci'ioed.

ln testimony whexecic 'l my. signatuie with a inolding-iiasln 

